| 摘要 |
PROBLEM TO BE SOLVED: To provide a door having a door guard which prevents the door from being unintentionally brought into a locked state out of an unlocked state, has an excellent operability, and prevents the door from being brought into the unlocked state from the locked state by a single operation. SOLUTION: The door guard includes an arm provided to the door and a receiving device provided to a door frame. The arm includes an engagement hole and a disengagement hole. The receiving device includes a body and a rotating body. The rotating body includes a fitting part which comprises an engagement part, is rotatable between the unlocked state and the locked state, and is provided to the rotating body, part to be fitted which is provided to the body, and a pressing means for pressing the rotating body to the fitting position. The fitting part comprises a projection which projects in the rotational axial direction of the rotating body, and is fitted to the part to be fitted in the unlocked state and the locked state for holding the unlocked state and the locked state. The part to be fitted which holds the unlocked state comprises a groove extending along the tangent of the rotating path of the fitting part, and has, at the portion thereof through which the fitting part extends, a slope extending from the bottom part continuously to the opening part. The part to be locked which holds the locked state comprises a hole on the rotating path of the fitting part. COPYRIGHT: (C)2011,JPO&INPIT
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